Title of Dissertation: ROLE OF PEACH [PRUNUS PERSICA (L.) BATCSH] EXTRAFLORAL NECTARIES IN MEDIATING NATURAL ENEMY-HERBIVORE INTERACTIONS Clarissa Ruth Mathews, Doctor of Philosophy, 2004 Dissertation Directed By: Professor Dale G. Bottrell Department of Entomology Extrafloral nectaries (EFNs) are reported to benefit some plants when ants (Hymenoptera: Formicidae) use their secretions and fend ...

functional response in natural enemies is affected not only by host and natural enemy characteristics but also, the application of pesticide to pest population can affected the parameters of functional response as well as efficiency of natural enemy. in this research, the side effects of two pesticides, hexaflumuron and pymetrozin and also acaricide spirodiclofen and plant extracts, caiotropis ...

Root (1973) observed fewer pests in weedy Brassica oleracea plantings, and suggested this could be because greater plant diversity bolstered resources for natural enemies strengthened herbivore suppression (i.e., the Enemies Hypothesis) and/or disrupted host-location by specialist herbivores Resource Concentration Hypothesis). These proposed mechanisms have been exceptionally influential effort...

Comparisons of traits of outbreaking and nonoutbreaking leaf-eating Lepidoptera and Symphyta have shown that spring-feeding species are more likely to have outbreaks than are summer-feeding species. It has been suggested that variable synchrony with host budburst causes the population sizes of spring-feeding species to be more variable primarily because of the negative effects of older leaves o...

as the chief factors to be considered, we are promised that a Comprehensive, co-ordinated scheme, comprising notification, anti-tuberculosis dispensary, the sanatorium for early cases, the school for tuberculous children, the farm colony for working Patients, and the hospital for advanced cases, will, if systematically taken in hand, completely eradicate the disease ^thin a relatively short per...

Gardeners around the United States often call in reinforcements for pest control—ladybugs. Ladybug sellers claim that contrast to chemical pesticides, ladybugs are natural, but reality is more complicated. Conscripting into war on insect pests at home garden a continuation, not departure, from long history of militarized control US. This trajectory was inevitable. The divergent discussions and ...